Keep essential servers, storage, and network gear running through power disturbances with the Vertiv Liebert PSI5 Lithium-Ion 3000VA UPS. Its 2U rack/tower design fits cleanly into dense infrastructure environments, while the lithium-ion battery platform is suited to teams that want less battery maintenance than traditional VRLA systems. With 3,000 VA capacity and 120 V operation, it is sized for higher-density edge, branch, and small data center deployments that need more than basic backup. This model is a strong fit when downtime carries real cost. It helps bridge outages, ride through short power events, and support orderly shutdowns when utility power drops. The rack/tower format gives deployment flexibility in mixed environments, and the TAA designation supports procurement requirements for public sector and regulated buyers. For teams standardizing on dependable power protection, this UPS delivers the capacity and form factor needed to protect critical workloads without overcommitting rack space.